4.2.1.d to 4.5 Upgrade Fails

[daryll]

I'm running 4.2.1d. I picked up the upgrde to 4.5 this morning and tried to install it.
I uploaded it. That went fine.
I clicked install and that started out OK. It presented me with a screen saying:

The patch is ready to proceed. Click the "Commit" button below to complete the upgrade process.

If I look at the details, there's a list of files that are checked to be installed.

I then press the commit button and it says:

The new Upgrade Wizard will now resume the upgrade process. Please continue your upgrade.

Nothing else happens at that point. There is no button to continue. I can repeat these steps with the same results.

Any ideas?

[daryll]

I'm replying to my own post.

1) I probably should have posted in the Help area instead of here.

2) There's a thread there that discusses the same problem:
http://www.sugarcrm.com/forums/showthread.php?t=15945

i upgraded the 4.2.1 version when Sugar had a bad patch file that corrupted my server. I fixed it by reloading 4.2 manually, and then telling it to use my existing database. That meant my upgrade_history listed several ZIP files that were no longer on my server. The 4.5 patch fails if the upgrade_history includes any ZIP files that aren't on the server. So I manually deleted the extra entries from the upgrade_history and the 4.5 upgrade worked fine at that point.